Fireplace for boilers.



PATBNTED JULY 1'6, 1907.

P. TREIBEL. FIREPLAGB POR 4BOILBRS.

APPLICATION FILED APB.8,1907.

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FRIEDRICH TREIBEL, OF BERLIN, GERMANY.

FIREPLACE FOR BOILERS.

Specification of Letters Patent.

Patented July 16, 1907.

Application filed April 8, 1907. Serial No. 367,057.

To all whom it may concern:

Be it known that I, FRIEDRICH TREIBEL, machinist, a subject of theGerman Emperor, residing at Wiesenstrasse, in Berlin, Germany, haveinvented certain new and useful Improvements in Steam- Boiler Furnaces,of which the following is a specification. v

The invention relates to that class of steam-boiler furnacesin which airis fed to the interior of the` furnace in rear of the bridge-wall, andthe invention consists primarily in so disposing the mouths of the airconduits that the air is directed against the rear face of the walladjacent the top thereof.

The objects of this construction are to produce more perfect combustion,to cause the air to spread out somewhatin the nature of a sheet in orderto become thoroughly mixed with the flames and products of combustionflowing over the top of the bridge-wall, to protect the mouths of theconduits from becoming choked with soot and the like, and to reduce thetemperature of the bridge-wall.

The invention also includes the provision of a perforated horizontalplate disposed in front of the grate bars, or at the forward part of thefurnace, for the purpose of feeding air to the front of the re.Preferably, both of the air-feeding means are provided with regulatingdevices, or dampers, and, as shown, these regulating devices mayadvantageously be connected together for simultaneous operation.

It will thus be seen that the general object of the invention is topromote combustion by feeding air to the furnace in a novel manner andby regulating the quan' tity of air supplied.

In the drawings: Figure l is a vertical longitudinal section through asteam-boiler furnace embodying my improvements; Figs. 2, 3 and 4 aretransverse sectional views7 referred to the lines A-A, B-B, and C-G,Figpl, respectively; Fig. 5 is a `vertical longitudinal Asection takenthrough the horizontal perforated plate;

Fig. 6 is a fragmentary plan thereof; Fig. 7 shows a verticallongitudinal section through the bridge-wall and one of theair-conduits; and Fig. 8 is a horizontal section through the forwardportion of the bridge-wall.

Referring to these drawings: h indicates the bridgewall,`with its loweror body portion4 preferably constructed in the form of a hollow shell.Leading rearward through the back of this hollow shell, and thenceupward behind the bridge-wall are one or more airconduits, or pipes, b,the upper ends of which are directed forward and terminate slightly inrear of the back of the solid top portion of the bridge-wall andadjacent the top thereof. The front of the hollow portion of thebridge-wall is perforated to provide draft openings leading from theash-pit to the interior of the wall; and these openings are controlledby a sliding damper f, as more clearly shown in Fig. 8.

a indicates a horizontal perforated plate located at the front of thefurnace, in advance of the grate bars. The openings in this plateconduct air from the ash-pit door to the front of the combustionchamber, and are controlled by a forwardand rearward-sliding damper c,which preferably underlies the plate. Fig. 5 indicates that this damperis to be operated by means projecting through the front of the furnace,and it is obvious that such operating means may be of any desireddescription. I regard it as desirable to connect this longitudinallysliding damper and the transversely sliding damper f for simultaneousactuation, and have shown a rod or link connection d e for this purpose,the rear end of the rod being illustrated in Fig. 8 as connecting withthe damper f by means of a bell-crank lever.

In operation, it will be seen that air is drawn from the ash-pit intothe interior of the bridge-wall, and thence through the conduits, anddischarged against the rear side of the solid portion of the wall, whereit is spread out and diffused and becomes intimately mingled with theflame and products of combustion flowing over the top of the wall. Bythis arrangement, the temperature of the portion of the bridge-walldirectly exposed to the fire is materially reduced, and the mouths ofthe conduits are effectually guarded from soot, cinders and the like.The supply of air which is thus delivered to the rear of the bridge-wallmay be regulated or cut off by means of the damper f; and the connectionbetween this damper and the damper c enables the supply of air both atfront and rear of the fire-box to be controlled simultaneously.

While I have described one embodiment of my invention, I recognize thatvarious changes might be made within the scope of the appended claims,and all such I regard as falling within my invention.

Having thus described my invention, what I claim as new is:

1. In a steam boiler furnace, the combination of n bridge-wall, andconduits drawing air through said wall and projecting therebehind withtheir ends returned into close proximity with the upper part of the rearface of said wall, the conduit-mouths being disposed to cause theouttlowing air to impinge directly upon said face.

2. 1n a steam boiler furnace, the combination of a bridge-wall, and airconduits projecting rearward therefrom with their ends returned andmouthing against the rear face of said wall.

'3. In a steam-boiler furnace, the combination with the rebox andbridge-wall, of conduits drawing air through said wall and projectingrearward therefrom with their ends returned and mouthing against therear face of the wall, a horizontal perforated plate disposed at thefront of the firebox and designed to supply air in front of the fire,dampers coperating with said conduits and with l() said plate, andconnection between the two sets of dempers whereby they may be operatedsimultaneously.

In testimony whereof I ax my signature in presence of two witnesses.

A FRIEDRICH TREIBEL.

Witnesses WOLDEMAR HAUPT, i WILLIAM MAYNER.

